Pleased to report that I got the older Xbox One wireless controller (model 1708) today and it works well with AFS2021 with the default settings. Almost exactly as I set it up except the collective is a button press down and up, not the left stick which I prefer for better sensitivity and control. Rudder is left and right paddles by default which you really need for a heli. It works in other games on the ipad as well with ipadOS13.7, even though the game doesn't recognise it as a controller, same as Aerofly, it just works.
Might try to change the settings on my old PC and see if that works. The analogue sensitivity settings in Aerofly control menu doesn't seem to change anything. Highly recommend for heli flying - as good as my older xbox controller on the PC. Seems that ios13 was the fix for wireless controllers and ios14.5 to be released will be the fix for the new xbox series X wireless controller which I will keep for the new ipad later this year.
Happy days 🙂..... thks team Aerofly
Edit: well the default settings are not perfect - don't expect a smooth controller experience, its a bit quirky but it does work. Its way too sensitive and can't seem to lower this, but its still easier and preferable to control than with the ipad tilt or analogue onscreen controls. On my old PC (old heli sims like fsx) I have lowered the stick sensitivity which makes helos easier to fly. An example of how quirky it is is you can't change the fixed view position when in game. Whatever the last position was, external or internal will be what it is in game. To change view you have to disconnect the controller and change view and then reconnect the controller and start over. With this controller all you can do is control your view with the left stick (acts like a hat switch) but you can't actually change views like inside or outside if that makes sense. So if you are desperate to fly a heli with a wireless controller it works (but its not perfect), but this control thing needs work- hopefully we will get future support in game from Aerofly to customise controllers. To be able to down adjust the sensitivity would be helpful. But for now its good enough for me.
Not sure right now if the problem is too high sensitivity on the right stick (cyclic), can't lower it, OR it is the self-centering spring forces, ie too stiff. I notice that the elite 2 allows you to adjust spring forces. I suspect the problem is the sensitivity, not springs, as I have xbox controllers on heli sims on the PC and have no problem with the spring forces at all. Xbox twin stick controllers are far less stiff than joysticks. Joysticks are notoriously stiff by default. Anyways hope this helps anybody considering wireless control on the ipad for Aerofly mobile.